Add demo site to readme

Author: Mykolas

README.md

@@ -2,6 +2,10 @@
 
 The consensus-based chess inspired estimation game.
 
+# Demo
+
+[planningchess.com](http://planningchess.com)
+
 ## Rules
 
 - The game is played by a team (multiple players)
@@ -102,6 +106,10 @@ This starts all micro-services in watch mode.
 
 `build` - builds all services.
 
+`package` - package docker image.
+
+`deploy` - deploy to demo site (special permissions are needed)
+
 ## Contributing guidelines
 
 [Please refer to the contribution guidlines file](CONTRIBUTING.md)